Watch a Shroud of Cold Air Descend Across the Country

As anyone north of Florida has probably already pieced together for themselves by now, this week has been a bitterly cold one for most of the country. The bad news: The frosty weather is expected to stick around over the next few days for much of the country. The good news: NOAA has this rather awesome-looking video of how the cold air spread. It's probably not an equal tradeoff for those of you living in Crane Lake, Minn. (where the mercury fell to negative-35 degrees Fahrenheit on Tuesday), but, hey, at least it's something.